Brief on coaxial rf test socket

The RF radio frequency test socket is mainly composed of three parts: the shell of the test socket, the common probe of the test socket, and the RF radio frequency coaxial connector.

In the RF test socket, most of the rg402 structure is similar to the ordinary test socket, except for the coaxial connector.

RF connector is a radio frequency coaxial connector, which mainly plays the role of communication radio frequency. Through the joint efforts of the world's communications industry, the RF connector has formed a professional system and international standards, and is also an indispensable part of the connector.

The general pin of the RF radio frequency test socket uses the corresponding coaxial cable assemblies probe, but because the radio frequency transmission signal requires special media, the corresponding connector part is also very special. Our common radio frequency coaxial connector (RFCOAXIALCONECTOR) is one of them.

According to the design selection of the rg405 RF connector in the corresponding test socket, you can refer to the following (not limited to the following interfaces). When customizing the test socket, you must propose your own chip damage and damage requirements (S12/S21 and S11) to the supplier, and at the same time coaxial forward your own contact impedance requirements.

BNC is a bayonet type, which is mostly used for rg405 radio frequency connections below 4GHz, and is widely used for the connection of meters and computers.

TNC is similar to BNC in terms of threaded connection and size. The working frequency reaches 11GHz. The threaded type is suitable for vibration environment.

SMA connector, which is the most widely used, with impedances of 50 and 75 ohms. When 50 ohms, the use frequency of flexible cables is lower than coaxial, and semi-rigid cables are up to 26.5GHz.

SMB connector is smaller than SMA connector. In order to insert a self-locking structure, it is used for fast connection, and is often used for digital communication. It is a substitute for L9. 50 ohms can reach 4GHz, and 75 ohms can reach 2GHz.

SMC is a threaded connection, other similar to SMB, with a wider frequency range, and is often used in military or high-vibration environments.

The n-type connector is a threaded type, uses air as an insulating material, has a low cost, and has a frequency of rg405 11 GHz. It is commonly used in test instruments, and has 50 and 75 ohms.

MCX and MMCX connectors are small in size and are used for dense connections.

BMA rg402 is used for blind mating of low-power microwave systems with frequencies up to 18 GHz.

Third, the application of RF radio frequency test socket.

With the upgrading of high-speed coaxial cable assemblies communication standards such as 5G and WIFI6, new RF chips are widely used in mobile devices such as mobile phones and tablet computers, communication platforms such as communication base stations. The demand for RF test sockets is getting higher and higher, and the main RF chips use aging tests, functional tests and special tests in extreme environments. Therefore, the RF test sockets also put forward higher test requirements.

Fourth, the rg402 production method of coaxial RF radio frequency test socket:

Product design needs to rely on data, including chip size (length, width and thickness), chip spacing, chip shape, the frequency at which the chip needs to run in the chip test, and the corresponding damage, damage and other data. Some RF chips have high power and may need to provide overcurrent requirements. As we all know, the coaxial cable assemblies overcurrent capability of the test socket is less than 1A, so the overcurrent capability of the power pin of the chip needs to be considered. Otherwise, it will affect the test data of the chip with full firepower. Namely coaxial RF coaxial connector (Isolation also needs to be considered)

Five, the maintenance of the coaxial RF radio frequency test socket:

The RF test socket needs regular maintenance. Check the contact probe and RF connector with a microscope every rg405 5000 times to check whether there is dirt and needle wear on the top of the needle to ensure that the test socket always maintains a good test condition. If there is dirt, it is recommended to use ultrasonic cleaning equipment, add high-purity alcohol for ultrasonic cleaning, and then use an air gun for the final cleaning to ensure that the test seat is dry, and the rg402 product life and test performance are guaranteed. If there is slight abrasion, it will not affect the test (that is, there is no big error in the test data), and you can continue to use it after cleaning. If it is severely damaged, the probe and RF connector need to be replaced.